A personal publication for curious developers

Understand the idea.
Build with confidence.

Practical articles and visual lessons on software, AI, and the systems behind everyday applications.

Read. Try. Understand.

From the blog

AI 9 min read

Compare chatbots, workflows, and AI agents through the same support ticket, with control flow, costs, failure cases, and a practical decision guide.

AI 10 min read

Follow an AI agent through support-ticket triage, run a bounded Python simulation, and learn when a script or workflow is the better choice.

System Design 6 min read

Understand cache hits and misses with a runnable Python example, expiration, invalidation, practical use cases and caching trade-offs.

Technology 14 min read

Learn how single-flight request coalescing prevents cache stampedes, reduces database queries, and improves Python API performance.

Marketing 20 min read

What are UTM parameters and how do they work? Learn to create tracking links, measure campaigns in GA4, and avoid common mistakes with examples.

Technology 16 min read

Learn the difference between design language and design system with simple examples, comparisons, and real case studies from top companies.

SkillsHats Visualize

Follow an algorithm step by step. Change an input. Watch a system respond. Build an intuition for what the code is doing.

Data structures & algorithms · System design

Beginner Data Structures & Algorithms / {{ featured_lesson.subtopic.title }}

One comparison. Half the possibilities.

2 5 8 12 mid 16 23 38

Looking for 23: 12 is too small. Keep the right half.

Worst-case time O(log n) Try lesson